It is easier to build centralized on top of decentralized than the other way around. This is the whole idea.
People trend to centralization but it doesn’t mean: let’s give up on decentralization and just give one company, or a select few, the keys to the entire kingdom.
besides, as uximproves it will be easy to just use the blockchain directly. like using an on-chain long or short position, or staking some value, rather than only doing it on a centralized exchange.